#define _CRT_SECURE_NO_WARNINGS 1

#include<stdio.h>

int is_leap_year(int x)
{
	if (((x % 4 == 0) && (x % 100 != 0)) || (x % 400) == 0)
		return 1;
	else
		return 0;
}

int main()
{
	int year = 0;
	int month = 0;
	int day = 0;
	while(scanf("%d %d", &year, &month)!=EOF);
	{
		switch (month)
		{
		case 1:
			printf("31\n");
			break;
		case 2:
			if (is_leap_year(year))
				printf("29\n");
			else
				printf("28\n");
			break;
		case 3:
			printf("31\n");
			break;
		case 4:
			printf("30\n");
			break;
		case 5:
			printf("31\n");
			break;
		case 6:
			printf("30\n");
			break;
		case 7:
			printf("31\n");
			break;
		case 8:
			printf("31\n");
			break;
		case 9:
			printf("30\n");
			break;
		case 10:
			printf("31\n");
			break;
		case 11:
			printf("30\n");
			break;
		case 12:
			printf("31\n");
			break;
		}
	}
	return 0;
}